Effect of in situ formation of Ti(C,N) on the properties of Al2O3-ZrO2-C slide plate material

Al2O3-ZrO2-C slide plate was ordinarily used in sliding nozzle system because of its excellent mechanical properties and slag corrosion resistance. This study improved the slag corrosion resistance of the slide plate by the carbothermic reduction of TiO2 and aluminothermic reduction of TiO2 under high temperature in coke bed to generate Ti(C,N) phase in situ. The result revealed that TiC of the high melting point phase could enter into anorthite (CaAl2Si2O8) of the low melting point phase, forming eutectic phase CaAl2Si2O8-TiC, and improve the viscosity of the slag. Furthermore, TiC and CaAl2Si2O8 captured FeO and MnO from the slag, resulting in the increase of the slag viscosity, inhibiting the penetration corrosion of the slag, and improving the slag corrosion resistance of the materials. In general, compared with the material without TiO2 powder, the slag corrosion resistance of the material introduced 2 wt.% TiO2 powder was increased by 24%. Meanwhile, the cold crushing strength of fired specimen at room temperature was increased by 35.6%.